BS EN 14276-2:2020 pdf free.Pressure equipment for refrigerating systems and heat pumps.Piping一General requirements. BS EN 14276-2 1.5 This document applies to piping with an internal pressure down to -1 bar, to account for the evacuation of the piping prior to charging with refrigerant.1.6 This document applies to both the mechanical loading conditions and thermal conditions as defined in EN 13445-3:2014/A5:2018...